摘要
三辛基氧化磷(TOP O)可以与一些环保分子结合,形成疏水深共晶溶剂,用于从废SmCo磁体中提取稀土元素钐(Sm)。由于共晶溶剂的形成,水溶液中TOPO的损失明显减少。本文通过开展试验,研究了不同振动时间、盐酸浓度、氯化钠浓度和溴化钠浓度下的Sm^(3+)萃取行为。结果发现,在所有制备的共晶溶剂中,Sn^(3+)浓度为5.6 mol/L时,TOPO/十二醇具有最佳的Sm^(3+)提取率(98.9%)。在多金属选择性萃取试验中,共晶溶剂对Sm^(3+)表现出良好的选择性。加入3 mL氢氧化钠溶液(浓度0.5 mol/L)后,萃取的Sm^(3+)易于完全反萃,经过4个周期的提取试验,回收的提取剂提取能力保持不变。此外,通过使用响应面法(RSM)优化,盐酸浓度控制在1.27 mol/L,氯化钠浓度控制在2.65 mol/L,在最佳试验条件下,Sm^(3+)提取率进一步提高。
Trioctyl phosphorus oxide(TOPO)can combine with some environmental molecules to form a hydrophobic deep eutectic solvent for extracting rare earth element samarium(Sm)from waste SmCo magnets.Due to the formation of eutectic solvent,the loss of TOPO in aqueous solution is significantly reduced.In this paper,experiments are carried out to study the extraction behavior of Sm^(3+) under different vibration time,hydrochloric acid concentration,sodium chloride concentration and sodium bromide concentration.The results show that TOPO/dodecanol has the best extraction rate of Sm^(3+)(98.9%)when the concentration of Sm^(3+) is 5.6 mol/L in all prepared eutectic solvents.In the experiment of selective extraction of polymetallic compounds,eutectic solvents show good selectivity for Sm^(3+).After adding 3 mL sodium hydroxide solution(concentration 0.5 mol/L),the extracted Sm^(3+) is easy to be completely back extracted,after 4 cycles of extraction test,the extraction capacity of the recovered extractant remains unchanged.In addition,the concentration of hydrochloric acid is controlled at 1.27 mol/L,and the concentration of sodium chloride is controlled at 2.65 mol/L through optimization using response surface methodology(RSM),under the optimal test conditions,the extraction rate of Sm^(3+) is further improved.
作者
高习贵
李瑞宏
孙明华
杨培生
尹少毅
于庆华
赵善奇
GAO Xigui;LIRuihong;SUN Minghua;YANG Peisheng;YIN Shaoyi;YU Qinghua;ZHAO Shanqi(Zhongxi Tianma New Material Technology Co.,Ltd.,Jining 272620,China;Zhongtian Jiesheng(Tianjin)New Materials Technology Co.,Ltd.,Tianjin 301800,China)
出处
《中国资源综合利用》
2022年第11期18-23,共6页
China Resources Comprehensive Utilization
基金
济宁重点研发计划项目(91370832559914305G-2016JNZDYF18/1,2019ZDGH025,2021ZDZP029)。
关键词
三辛基氧化磷
疏水深共晶溶剂
提取
二级资源
trioctyl phosphorus oxide
hydrophobic deep eutectic solvent
extraction
secondary resources
